This Panasonic phone has lots of terrific features to make it useful to everyone in the house. Phone offers 40dB of amplification with 6 voice tone settings for people with moderate hearing loss. It also offers Slow Talk to slow the speed of speech in real time and when checking voice messages. For people with low vision, it offers large backlit keys, as well as talking caller ID and a talking keypad. It also includes a 17 minute answering machine, 100 name and num-ber phone book, and call blocking up to 250 numbers. Expandable up to 6 total handsets, using item number 721150.